Mitsubishi HK-KT7M3G5-1-21 3-Pole Circuit Breaker 125-250A

The Mitsubishi HK-KT7M3G5-1-21 is a 3-pole molded case circuit breaker designed for electrical distribution and protection applications. It features an adjustable rated current (Ir) range of 125 to 250 amperes, making it suitable for a variety of medium-power installations. The ultimate short-circuit breaking capacity (Icu) and service short-circuit breaking capacity (Ics) are both rated at 36 kA at 440 VAC, ensuring reliable fault protection under demanding operating conditions. This circuit breaker provides overcurrent and short-circuit protection for electrical circuits in industrial environments such as factory automation systems, power distribution panels and motor control centers. Its 3-pole configuration is intended for three-phase AC power systems. The equal Icu and Ics ratings indicate that the breaker maintains full operational capability even after interrupting a fault at its maximum rated capacity. The HK-KT7M3G5-1-21 is a genuine Mitsubishi replacement part suitable for use in existing Mitsubishi switchgear and distribution equipment.